CheerpJ
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CheerpJ
  1. Overview
  2. Getting started
    1. Run a Java Application
    2. Run a Java Applet
    3. Run a Java Library
    4. Run a JNLP
  3. Guides
    1. Intercept external commands
    2. Networking
    3. Resource preloading
    4. Basic Server Setup
    5. Debugging CheerpJ
    6. Filesystem
    7. Implementing Native Libraries
    8. Implementing Native Methods
    9. Library mode
  4. Reference
    1. cheerpjInit
    2. cheerpjRunMain
    3. cheerpjRunJar
    4. cheerpjRunLibrary
    5. cheerpjCreateDisplay
    6. cjFileBlob
    7. cheerpOSAddStringFile
    8. cheerpOSRemoveStringFile
    9. cjGetRuntimeResources
    10. cjGetProguardConfiguration
    11. CJ3Library
  5. Tutorials
    1. Run a Java App in the Browser (SwingSet3)
    2. Run a Java Applet in the Browser (FoilSim)
    3. Run JNLP Apps in the Browser
    4. Swing Browser (Networking)
    5. Server-Client (Networking)
    6. Java and JavaScript Interoperability
  6. Explanation
    1. Files and filesystems
    2. Architecture
  7. Frequently Asked Questions
  8. Migration from CheerpJ 2
  9. Changelog
  10. Licensing
  11. Open Source Copyright Notices

Tutorials

  • Run a Java App in the Browser (SwingSet3)
    Porting a Swing application to the web
  • Run a Java Applet in the Browser (FoilSim)
    Running an applet with CheerpJ
  • Run JNLP Apps in the Browser
    Run a working example of a JNLP application or applet
  • Swing Browser (Networking)
    Run a Java application with Internet connection
  • Server-Client (Networking)
    Communication between two Java apps using CheerpJ and Tailscale.
  • Java and JavaScript Interoperability
    Learn how to enable Java and JavaScript communication using CheerpJ
Leaning Technologies
UK Business Tech Awards 2022 Finalist National Technology Awards 2022 Winner

Technology

  • Cheerp
  • CheerpJ
  • CheerpX
  • CheerpX for Flash
  • BrowserPod

Browser extensions

  • CheerpJ Applet Runner
  • CheerpJ JNLP Runner

Resources

  • Documentation
  • Blog
  • GitHub
  • Contributing

Company

  • About us
  • News
  • Privacy policy
  • Careers

© 2026 Leaning Technologies . All rights reserved.

Cheerp is a registered trademark of Leaning Technologies. The Cheerp, CheerpJ, and CheerpX logos are based on the HTML5 logo by W3C (license)